As reported at The Verge and NASA Spaceflight, NASA officials admitted today the Space Launch System is a vehicle without a mission plan. The agency acknowledged what is essentially an empty flight manifest for the SLS at NASA’s Kennedy Space Center (KSC) in Florida during an all-hands meeting on Monday.

A test flight of the rocket, which will send people into orbit around the Moon, was originally planned for no later than August 2021, but that has been pushed back to April 2023. Follow-up test flights are set for the mid to late 2020s, but no dates have been locked down yet. During the KSC meeting, two NASA administrators blamed NASA’s funding for the lack of SLS bookings, NASA Spaceflight reports.